<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css07">
</head>
<body>
<div class="container">
    <h2>基本样式</h2>
    <table style="width: 500px;" class="table">
        <thead><tr><th>科目</th><th>成绩</th></tr></thead>
        <tbody>
        <tr><td>高数</td><td>88</td></tr>
        <tr><td>大学英语</td><td>90</td></tr>
        <tr><td>计算机</td><td>86</td></tr>
        </tbody>
    </table>
</div>
</body>
</html>